High-load big bore lock
US6516889B1 · kind B1 · utility
2Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2000 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A high load wireline lock features a plurality of dogs supported by a fishing neck. Radial loads, transmitted through the dogs when the lock is engaged, are in turn directed into the fishing neck in the manner so as to distribute the load into the wall of the fishing neck. The contact between the dogs and the fishing neck is along sloping surface which minimize the radial forces against the fishing neck and in turn applies forces in a near tangential direction through the wall of the fishing neck thus greatly increasing the load capacity of the wireline lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.